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Displacement detector and machine having displacement detectorDisplacement detector and machine having displacement detector description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080005604, Displacement detector and machine having displacement detector. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001]The present invention relates mainly to a displacement detector that determines whether a machine such as a machine tool has been displaced from a predetermined installation site and a machine having the displacement detector. [0002]Generally, it is desired that high-precision machines and high-performance machines be prevented from being exported illegally and installed under conditions instructed by a manufacturer. It is thus extremely important to monitor whether such machines have been displaced. [0003]For example, Japanese Laid-Open Patent Publication No. 2003-35595 discloses a technique in which a vibration detector detects vibration of a machine tool caused by displacement of the machine tool or by an earthquake. When such vibration is detected, activation of the machine tool is prohibited or operation of the machine tool is suspended. However, since the device of this document detects all types of vibrations including those caused by the operation of the machine tool and an earthquake, it is difficult to determine whether such vibration has been brought about by displacement of the machine tool. SUMMARY OF THE INVENTION [0004]Accordingly, it is an objective of the present invention to provide a displacement detector that easily determines whether a machine has been displaced, and a machine having the displacement detector. [0005]To achieve the foregoing objective and in accordance with a first aspect of the present invention, a displacement detector that determines whether a machine installed at a predetermined position has been displaced from the position is provided. The detector includes an element and a determining device. The element detects rotation of the machine caused by change of the orientation of the machine. The determining device determines whether the machine has been displaced based on rotation data of the machine obtained by the element. [0006]In accordance with a second aspect of the present invention, a machine having the displacement detector according to the above first aspect is provided. The machine has a displacement determination processing section that communicates information with the displacement detector. In response to a demand from the displacement determination processing section, the determining device transmits information indicating whether the machine has been displaced to the displacement determination processing section. When a body power switch of the machine is turned on, the displacement determination processing section outputs an ON instruction to the power ON/OFF circuit and receives the information indicating whether the machine has been displaced. If the machine has been displaced, the displacement determination processing section restricts operation of the machine. BRIEF DESCRIPTION OF THE DRAWINGS [0007]FIG. 1(A) is a side view showing a machine tool installed at an installation site; [0008]FIG. 1(B) is a plan view showing the machine tool; [0009]FIG. 1(C) is a block diagram representing a rotation detecting unit and a displacement determination processing section; [0010]FIG. 2 is a perspective view showing the machine tool displaced from the installation site to a different position; [0011]FIG. 3 is a plan view showing the machine tool that rotates when being moved from the installation site to the different position; [0012]FIG. 4 is a block diagram representing the configuration of the rotation detecting unit according to a first embodiment of the present invention; [0013]FIG. 5 is a flowchart representing a rotation detecting unit procedure; [0014]FIG. 6 is a flowchart representing a communication procedure of the first embodiment; [0015]FIG. 7 is a flowchart representing a detection procedure of the first embodiment; [0016]FIG. 8 is a flowchart representing a procedure performed when the power source of the body of the machine tool is turned on; [0017]FIG. 9 is a block diagram representing the configuration of a rotation detecting unit according to a second embodiment of the present invention; [0018]FIG. 10 is a flowchart representing a detection procedure of the second embodiment; [0019]FIG. 11 is a flowchart representing a data updating procedure of the second embodiment; [0020]FIG. 12 is a flowchart representing a communication procedure of the second embodiment; and [0021]FIG. 13 is a table representing data obtained through the detection procedure of the second embodiment. Continue reading about Displacement detector and machine having displacement detector... Full patent description for Displacement detector and machine having displacement detector Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Displacement detector and machine having displacement detector patent application. Patent Applications in related categories: 20090287944 - System and method of controlling an operating frequency in an electronic system - A method and apparatus for adaptively adjusting the operating voltage of an integrated circuit in response to tester-to-system variations, worst-case testing techniques, process variations, temperature variations, or reliability wearout mechanisms. The minimum operating voltage of an integrated circuit is determined either during external testing of the integrated circuit or during ... ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. 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